An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Bragge P, Clavisi O, Turner T, Tavender E, Collie A, Gruen RL.Bragge P, et al. Among authors: gruen rl.BMC Med Res Methodol. 2011 Jun 17;11:92. doi: 10.1186/1471-2288-11-92.BMC Med Res Methodol. 2011.PMID: 21682870Free PMC article.
Parkhill AF, Clavisi O, Pattuwage L, Chau M, Turner T, Bragge P, Gruen R.Parkhill AF, et al.J Med Libr Assoc. 2011 Apr;99(2):157-60. doi: 10.3163/1536-5050.99.2.008.J Med Libr Assoc. 2011.PMID: 21464854Free PMC article.No abstract available.